基于PC机群波动方程叠前深度偏移的并行计算策略  

Parallel Computing Strategy Based on PC Cluster for Wave Equation Prestack Depth Migration

作　　者：潘宏勋[1] 方伍宝[1] 

机构地区：[1]中国石化石油勘探开发研究院南京石油物探研究所,南京210014

出　　处：《吉林大学学报（地球科学版）》2008年第4期708-712,共5页Journal of Jilin University：Earth Science Edition

基　　金：中国石化股份有限公司重大科研项目(P00024)

摘　　要：基于波动方程的叠前深度偏移技术是解决复杂地质地貌地区地震成像的一种非常有效的手段,但是在实际应用中面临着数据量巨大和计算量巨大的双重困难。以PC机集群为硬件环境,以MPI消息传递并行编程环境为并行程序设计平台,研究设计出请求分配作业的主从模式来实现波动方程叠前深度偏移的并行计算,从而解决了动态负载均衡难题,采用的作业登记与分析技术解决了容错处理问题。理论模型数据和实际地震资料测试结果表明:程序运行稳定,并行效率高。对我国东部地区某三维地震数据进行了处理,用请求分配作业的主从模式比平均分配作业的主从模式节省了23.68%的时间。Prestack depth migration based on wave equation is an efficient tool for seismic imaging in area with complex topography and geology characteristics. In practical application, however, it is confronted with two difficulties of enormous data volume and huge computation cost. Therefore, based on the PC Cluster and Message Passing Interface （MPI） program development environment, Job-by-Appli- cation master-slaver scheme was designed to implement the parallel computing of wave equation prestack depth migration. This method solved the problem of dynamic load balancing. Job registration and analysis approach used in this method settled the problem of fault-tolerance processing. The result with both theoretical model data and field data showed that this parallel program was correct, the running of the program was stable, and the efficiency was desirable. The Job-by-Application master-slaver scheme saved 23. 68% time by using Job-by-average-allocation master-slaver scheme in processing one of 3D seismic data in eastern China.

关 键 词：叠前深度偏移 并行计算 请求分配作业的主从模式 动态负载均衡 容错处理 

分 类 号：P631.4[天文地球—地质矿产勘探]